The fatty acid composition of human gliomas differs from that found in nonmalignant brain tissue

Lipids
D D MartinD H Hussey

Abstract

To compare the fatty acid composition of tumor tissue from glioma patients with that of normal brain tissue, tissue samples were obtained from 13 glioma patients and from 3 nonmalignant patients. Following lipid extraction, total fatty acid composition was measured using gas-liquid chromatography. samples were further separated into phospholipids and neutral lipids. Representative samples were then separated into phospholipid classes by thin-layer chromatography and the fatty acid composition assayed. Levels of the polyunsaturated fatty acid (PUFA) docosahexaenoic acid (DHA), were significantly reduced (P = 0.029) in the glioma samples compared with normal brain samples; mean values were 4.8 +/- 2.9% and 9.2 +/- 1.0%, respectively. This reduction in glioma DHA content was also observed in terms of phospholipids (4.6 +/- 2.1% vs. 9.6 +/- 0.8%, P = 0.002). The phosphatidylserine and phosphatidylethanolamine phospholipid classes were reduced in the glioma samples. Differences were also noted in the n-6 PUFA content between glioma and normal brain samples. The glioma content of the n-6 PUFA linoleic acid was significantly greater (P < 0.05) than that observed in the control samples in terms of total lipids. Thus, the fatty acid com...Continue Reading

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